Heat regulator



May 27, 1924. 1,495,199

F. J. .PORWOLL HEAT REGULATOR Filed July 23, 1921 2 Sheets-Sheet 1' I 1. M58858 1 JflI/{QL INVEN TOR.

ATTORNIEIY.

Patented May 27, 1924. I

UNITED STATES rmx J. POBWOLL, 03'

8'1. CLOUD, MINNESOTA.

nm'r nnomron Application fled July 28,

To all whom it may concern:

Be it known that I Faun; J. Poswom,

citizen of the United states, residing at St. Cloud, in the county of Stearns and State of Minnesota, have invented certain new and useful Improvements in Heat Regulabors, of which the following is a specification. This invention relates to new and useful improvements in heat regulators and more particularly to the type employed for governin the temperature o sad-irons.

An the important object of this invention is to provide a device of the above nature whereby the iron may be maintained at any do of temperature desirable and which wil prevent the irons from overheat ing and thereb wasting electricity.

A further ject of the invention is to provide a novel arrangement of various parts whereby the efliciency of the regulator will be increased.'

Still another object of the invention is to provide a device of the above nature which consists of the minimmn number of parts all of which are of a substantial construction and which may be produced at the minimum cost.

Other cheats and advantages of the in,- vention wil become apgarentduring the course of the following escription.

In the accompanying drawings forming a part of the application and wherein the numerals are em loyed to designate like parts throughouto several views,

Figure 1 1s a longitudinal section through the and iron with the invention applied therein,

F igure-2 is a diagrammatic view,

Figure 3 is a fragmentary top plan 'of the iro Figure 4 is an enlarged elevation of the heat adjusting-mechanism,

Figure 5 is an enlarged fragmentary view of the portion thereof,

Fi re Bis an elevation of solenoid retractmg mechanism,

Fi re 7 is a transverse section taken on line 7 of Fiailire' 6, and

Figure 8 is a orizontal transverse section taken on line 8-8 of" Figure 6.

Beferring now more particularly to the di-awingswherein for the prllgiose of H108. tration is shown the prefer embodiment of m invention, the numeral 10 designates 0. -iron of the electric type embodying a a 1821. Beth] No. 487,042.

basell and a casing 12 fitted upon the base to rise therefrom in the well known manner. A handle 13 of any desired cbnstruction is secured to the to of the casin as shown m Figure 1 and ectric terinina 14 extend from the rear end of the casing in the ordinary manner for association with a wire lplug not shown.

A resting element 15 of any desired construction is fastened to the upper surface of the base and conforms to the shape of the base so that the heat therefrom may be equally distributed over the base of the iron. For securing the heating element to the base, lugs'lti carried by the casing 12 overlap a piece of nsulation 17 positioned upon the top of the heating element and an elongated screw 18 passes t rough the top of the iron easing, through the insulation, heating element and into "the base. Of course this screw is suitably insulated from the hestin element so as not to client a short circuit through the iron.

In the toe of the iron the thermostat support 19 rests upon the'insulation 17 and is secured thereto in any suitable manner. The lugs 16 carried by the casing of the-iron project inwardly therefrom to overlap the thermostatsupport to prevent vertical displacement thereof. The of most any constructiop but is preferably of the type that consists genera-1y of an elongated flexible strip havin one end fastoned to its support 19. The as end of the thermostatic strip is provided with a nonarcing contact 21. The thermostat is adapted to be arranged directly above the heating element and approximately centrally thereof so as to be afiectedby any variation in the temperature of the heating element.

The heat regulating device clearly shown in Fig. 4 consists of a base member 22 secured to the insulation 17 and includes a pair ofspaced standards or arms 29 each of which is provided with an opemn as shown in Fig 5. An opening in one o the arms 23 is of irregular shape as seen in F'i 5 for reception of a correspondinglgtsha portion of'a sliding contact bar bar is also slidably mounted in the opening of the other arm and opposite ends of the bar extend beyond the arms 23. A flat curved spring has one end thereof secured to the base 22 of the ad ustor between the arms while the free end 1s thermostat may he desired adjusted adapted to frictionally engage the sliding contact 24 so as to retain the" latter in any osition. The base 22 1s of course provid with a binding post 26 whereby current may be passed there through. The sliding contact at one end is vi ed with an insulated upstanding arm which is adapted to slrojcet' up through an elongated slot 28 in e to o the iron casing 12. The uppermost on of the arm 27 is bent at right angles to provide a pointing finger 29 for coo oration with a dusted scale 80 inscri on the top of t e ll'Ol'l casing adjacent to the slot 28. I

Referring now to F 2, it will be seen that a solenoid 31. is positioned upon the insulating material 17 and includes a slidin core 32 the outermost end' of which is sli ably mounted in an uplstandipg bracket 33 carried by the insula' on. or retaining the core retracted from the magnet or solenoid, a coil spring 34, is secured to. the outermost end of the core throlgh the eye therein and is also provided or retaining the non-arcing contacts 35 carried by thecore l!I"-U from similar contacts 36 fastens the sheet of insulation 17.

This means for retainin the contacts and 86 spaced apart may substituted by means consisting substantially of a-weight 37 mounted for vertical-sliding movement in a pair of upstanding arms 88 fastened to the insulation. The upper end of each arm is provided with a non-arcing contact39 so that current may pass from one contact to another when the weight 37 is elevated to the upper ends of the arms 38. One of the arms is provided with an extension 40 which rojects to a point between the arms 38 and 51s end of this extension is arranged slight- 1y above the upper ends of the arms 88. A pair of pulleys are carried by the 11 per end of the extension 40 for iding a li t chain 42 which is connecte at one en to the weight and at its opposite end to the outer end of the core'82.

Current from any suitable source is led into the heating element 15 b means of a wire 43 and is conveyed there mtoone of the contacts 36 thruu h the medium of a .wire 44. Thoma et 1 is connected to the wire Mby wire and to theb' 26 of the adjuster by wire 46. Curran m the iron is led back to the through the medium of a wire 47 havinggconnection with the thermostat 30. Thefidther stationary contact 36 of the magnet is connected by From the foregoing description it will he understood that the contact 21 of the thermostat and the sliding contact of the aduster are engaged when the iron is cool so that current enteri the iron may pass throughthe heating e ement 15', magnet 31, into e adjuster mechanism, from where it travels through the contacts 21 and 24 into the thermostat of the iron rises to the degree to cause the flexing of the thermostatic strip,- tlie contacts 21 and 24 are separated thereby cutting oil the current and permittin the irons-to cool down. As soon as the coo ing action has progressed to a certain extent, the thermostatic stri will return so as to engage its contact with the sliding contact'% of the adjuster, whereupon the circuit will be established to permit current to a sin pass through'the system.

pen the closin of the contacts 21 and 24, the magnet will be energized thereby attracting the core 82 so that its contacts 35 on go the stationary contacts 36 to establis connection between the wires 44 and 48 whereby, the current of the iron may advance to thercturn wire 47 without passing through the adjuster and thermostatic strip. However, there will be a continual vibration of the core thereby continually making and breaking of the contacts 35 thereb permitting the current topass' through te adjuster and thermostat 20.

It will be obvious that which the current is opening and closed may. be varied as desired by adjusting the sliding contact 24 of the adjuster so that a ater or less amount of heat will be required to cause movement of the thermostatic strip 20.

The foregoing description and accompan nE drawings have reference to what mi'g t e considered to be the approved or referred form of m invention. I desire it to be understood t at I may make such changes in the construction, combination and arrangement of parts, material, dimensions, etc, as may prove expedient and fall within the scope of the ap ended claims.

Ha thus ascribed my invention whatl c as new and desire to secure by Letters Patent is: s

1. The combination with anelectric heating device including a heating element, a

source of electric current therefor, a piair of cod stationary contacts one of w ch is ectrically connected to the has element, a solenoid having its coil electrically connected to the connection between one of said a d stationary contacts and the heating u nt, the core of the solenoid being normally retracted from the coil and provided with a pair of contacts for the cooporation with thespaced stationary contacts, a thermostat contact electrically connected to the coil of the solenoid, a thermostatic strip adapted for cooperation with said last menthe temperature at" tioned contact, an'electric wire connecting the thermostatic strip with the source of current and a conductor connecting said wire with the unconnected contact of the spaced stationary pair of contacts.

2. The combination with an electric sadiron including a heating element, a thermostatic strip arranged thereabove. and including a contact, a contact means for cooperation with the contact of the thermostatic strip and including a pair of spaced su porting arms, a contact bar slidabl mounted therein, and 5 ring means fric-- tionally engaging the sli ing contact for retainin the same in adjusted position.

3. T e combination with a heating element, asolenoid, adjustable contacts and thermostat connected in series, a pair of I core from the electric m stationary spaced contacts one connected to the heating element and the other to the thermostat, and a pair of contacts carried by the core of the solenoid whereby the stationary contacts and those carried by the core are engaged upon energization of the solenoid.

4. The combination with a heating element, a thermostat associatedtherewith an electric magnet connected in series with the thermostat and the heating element, contacts carried by the core of the electric magnet, spaced stationary contacts for'coo er.-

ation with those of the, core, an upright having) a pulley associated therewith, and

a flexi is e ement connected tothe core, and

a wei ht connected to the other end of the flexibfia element for normally retracting the ct. a

5. The combination with a. sad-iron including a casing,-a heating element in the thermostat and the heatin iron, a thermostat arranged in the casing and connected in series to the heatin element, a sliding element associated wi the thermostat for regulating the amount of heat necessary for the actuation of thethermostat, the casing of the sad-iron being provided with a slot, and a handle for the sliding contact extending through the slot whereby the same can be manually controlled.

6. Iii a heating unit, a normally closed main circuit including a'heating element, a resistance coil, a solenoid including a core having a pair of contacts, athermostat electrically connected to said solenoid and the main circuit and including a pair of normally engaged contacts, ashnnt circuit including a pair of stationary contacts adapted to be intermittently engaged by the contacts carried by the solenoid core, and means connected to the solenoid core for normallyretainin the contact of the core separated from t ose of the shunt circuit.

7. The combination with a heatingv element, a thermostat associated therewith, an electric magnet connected in series with the element, contacts carried by the core of t e electric magnet, stationary-contacts for cooperation with those of the core, and means associated with the core for disengaging the contacts carried thereby upon deenergization of the electric;

magnet.

In testimony whereof I afiixed my signature in presence oftwo witnesses.

FRANK J. PORWOLL. Witnesses:

Joi: Kamrowsxr, Hnnann'r J. Seam. 

